Inseam-trimming machine.



H. A. BALLARD.

INSEAM TRIMMING MACHINE. APPLIOATION FILED MAY 2a, isos. BLNBWLD SEPT.13, 1912.

1 ,062,756. Patented May 27, 1913.

UNTTED sTATEs PATENT OFFICE.

HARRIE A. BALLARD, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO TI-IE BOYLSTONMANUFACTURING COMPANY, OF SOUTH BOSTON, MASSACHUSETTS, A CORPORA TION 0FNEW JERSEY.

INSEAM-TRIMMING MACHINE.

Application filed May 23, 1908, Serial No. 434,472.

T0 all 'wh-0m. t may concern.'

Be it known that I, HARRIE A. BALLARD, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Inseam-Trimming Machines, of which the following is aspecification.

This invention has relation to those machines used in the manufacture ofshoes which are known as inseam trimming machines.

It has for its object to provide certain improvements therein forrendering such ma-v chines more efficient and accurate in operation.

On the accompanying drawings, Figure 1 represents in side elevation amachine embodying the invention. Fig. 2 represents a magnified sectionthrough a portion of a partially formed shoe, and illustrates the actionof the shears or cutters. Fig. 3 represents a similar enlarged view ofthe operative portions of the cutters. Fig. 4 represents an enlargedsection on line 4 4 of Fig. 1.

On the drawings, 5 indicates a frame which may be of any suitable ordesirable construction having an cverhanging head 6. In'the frame arejournals for the reception of a shaft 7 from which power is im` partedto the movable knife or shear. This shaft 7 is driven in any suitableway, preferably by a heavy belt and momentum wheel 8.

9 indicates a two-arm lever fulcrumed upon a stud 10 projectinglaterally from the head. To the upper end of the upper arm of the lever9, is connected an eccentric rod 11, the strap 12 of which isoperatively engaged with an eccentric 13 on the end of the shaft 7. Thelower end of the lower armof the lever 9 is formed or provided with asegment 14 which is longitudinally split as shown in Fig. 4, toconstitute two clamping members 15 15 having a dovetailed groove 16.

17 indicates the movable blade or shear, the edges of which are beveledso that it may be clamped in the segment by drawing the members 15together with a screw 18. The blade or shear 17 is curved in thedirection of its length, its curvature being con` centric with the axisof the stud 10. The operative end of the blade has a cutting edge 19which is diagonal as shown. The segmental end of the lever 9 isillustrated as Specification of Letters Patent.

Patented May 27, 1913. Renewed September 13, 1912. Serial No. 720,273.

formed with a projection 20 which sup` ports and braces that portion ofthe shear or cutter which projects beyond the clamps 15, and preventsthe blade from springing upwardly. l

Coperating with the movable cutter blade or shear is an element whichserves two purposes, to wit, that of a stationary cutter blade and thatof a work gage or work rest. This element consists of a bar 21 locatedin a socket 22 in the head. The walls of the socket are formed with ears23 which may be drawn together by a screw 24 so as to clamp the barrigidly in place. 25 indicates' an adjusting set screw which is passedthrough the head into the socket so as to engage the end of the bar. Thelower end of the bar is curved downwardly and then laterally so as toprovide an under surface 26 against which the face of the inner sole maybe pressed by the operative. The end of the bar has also a flange 27which forms a stationary blade or shear, and the cutting edge 2S of theflange is at an acute angle to the cutting edge 19 of the blade orcutter 17. The upper surface 29 of the bent end of the bar is curved soas to be concentric with the axis of the stud 10, and the angularextremity of the blade 17 overlaps the upper surface of thecorresponding extremity of the blade 27.

In operation, the two blades are never completely separated, Fig. 3illustrating the limit of the movement of the blade 17 away from theblade 27. The thickness of the end of the bar determines the height ofthe unsevered portion of the work. In Fig. 2, a portion of a partiallyformed welt shoe is shown, and it will be seen that the lip a on theinner sole projects under the flange or cutter 27, and that the upper band its lining c project above the cutter and between the two cutters orshears.

I regard it as essential that the movable blade, which is locatedoutside of the seam, should overlap the stationary cutter or blade whichis inside of the seam, for the reason that I thereby produce upon thework a straight clean cut edge, whereas if the said movable bladeprojected under the stationary blade, it would necessarily pressdownward the upstanding unsevered portion of the work, or else force thework bodily downward from the rest. In either event, the edge cut uponthe work would be ragged and uneven. Furthermore, by causing the movableblade to overlap the stationary blade, they may both be so thick as tocut through tacks or other foreign substances Without injury to theiredges. On the other hand were the movable blade to pass under thestationary blade, it would have to be thin and would be constantlyliable to injury.

I propose to provide the machine With a series of combined Work rests orgages and stationary cutters or shears of different thicknesses, sincethe thickness of the end of the bar 2l determines the cut along theseam, or the height of the material which is left after the trimmingoperation.

Having thus explained the nature of my said invention and described aWay of constructing and using the same, although Without attempting toset forth all of the forms in which it may be made or all of the modesof its use, I declare that what I claim is 1. In an inseam trimmingmachine a stationary cutter to engage the inner face of the seam, areciprocatory cutter outside the seam, said cutters having their edgesat an acute angle, and the reciprocatory cutter overlapping thestationary cutter, whereby said reciprocatory cutter passes over thesevered edge of the Work Without depressing it, said stationary cutterhaving a flange to extend over the insole lip and engage the edge of theupper, substantially as set forth.

2. In an inseam trimming machine the combination with a movable cutterand means for supporting and actuating it, of a cooperating elementconstituting bo-t-h a Work gage and support and a stationary cutter,said element having a cutting edge extending under the movable cutter, afacesto engage the innersole of the Work and a flange to engage the edgeof the upper, the edges of the movable cutter and the stationary cutterforming an acute angle.

3. In an inseam `trimming machine, a movable cutter outside the seam anda stationary cutter to engage the inner face of the seam, saidstationary cutter having a face to engage the innersole of lthe Work,and a flange to extend over the innersole and engage the side edge ofthe upper, substantially as set forth.

In testimony whereof I `have aiiixed my signature, in presence of tvvoWitnesses.

HARRIE A. BALLARD.

Witnesses: v Y

JAS. H. CHURCHILL, MARCUS B. MAY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

